User's Manual

CLI (Command Line Interface)
220
NXA-ENET24 - Software Management Guide
MAC ACL Commands (Cont.)
Command Function
mask
(MAC ACL)
This command defines a mask for
MAC ACLs. This mask defines
the fields to check in the packet
header.
Use the no form to remove a
mask.
Syntax:
[no] mask [pktformat]
{any | host | source-bitmask} {any | host | destination-
bitmask}
[vid [vid-bitmask]] [ethertype [ethertype-bitmask]]
• pktformat – Check the packet format field. (If this keyword must be used
in the mask, the packet format must be specified in ACL rule to match.)
• any – Any address will be matched.
• host – The address must be for a single node.
• source-bitmask – Source address of rule must match this bitmask.
• destination-bitmask – Destination address of rule must match this
bitmask.
• vid – Check the VLAN ID field.
• vid-bitmask – VLAN ID of rule must match this bitmask.
• ethertype – Check the Ethernet type field.
• ethertype-bitmask – Ethernet type of rule must match this bitmask.
Default Setting: None
Command Mode: MAC Mask
Command Usage: Up to seven masks can be assigned to an ingress or
egress ACL.
Packets crossing a port are checked against all the rules in the ACL until a
match is found. The order in which these packets are checked is deter-
mined by the mask, and not the order in which the ACL rules were entered.
First create the required ACLs and inbound or outbound masks before
mapping an ACL to an interface.
Example:
This example shows how to create an Ingress MAC ACL and bind it to a
port. You can then see that the order of the rules have been changed by
the mask.
Console(config)#access-list mac M4
Console(config-mac-acl)#permit any any
Console(config-mac-acl)#deny tagged-eth2 00-11-11-11-11-11
ff-ff-ff-ff-ff-ff any vid 3
Console(config-mac-acl)#end
Console#show access-list
MAC access-list M4:
permit any any
deny tagged-eth2 host 00-11-11-11-11-11 any vid 3
Console(config)#access-list mac mask-precedence in
Console(config-mac-mask-acl)#mask pktformat ff-ff-ff-ff-ff-ff
any vid
Console(config-mac-mask-acl)#exit
Console(config)#interface ethernet 1/12
Console(config-if)#mac access-group M4 in
Console(config-if)#end
Console#show access-list
MAC access-list M4:
deny tagged-eth2 host 00-11-11-11-11-11 any vid 3
permit any any
MAC ingress mask ACL:
mask pktformat host any vid
Console#